Race Collection
Half Marathons in Idaho 2026–2027
There are 5 upcoming half marathons in Idaho on the 42Cal calendar, from October 2026 through June 2027.
5
Upcoming races
October 2026 – June 2027
Date range
1
Countries
394 ft
Median elevation
Race data last updated .
Upcoming Half Marathons in Idaho 2026–2027
5 races
- Oct 11, 2026Registration Open
City of Trees Marathon
Boise, Idaho, United StatesMarathonAlso: Half Marathon, 10K, 5K, 5K
See full guide - Nov 14, 2026Registration Open
Boise Half Marathon
Boise, ID, United StatesHalf MarathonSee full guide - May 30, 2027Registration Open
Coeur d'Alene Marathon
Coeur d'Alene, ID, United StatesMarathonAlso: Marathon, Half Marathon, 10K, 5K, 5K
See full guide - Jun 5, 2027Opening Soon
Spirit of Magic Valley Half Marathon
Twin Falls, Idaho, United StatesHalf MarathonAlso: 10K, 5K
See full guide - Jun 20, 2027Registration Open
Boise Marathon
Boise, ID, United StatesMarathonAlso: Half Marathon, 10K, 5K
See full guide
Compare These Races
| Race | Date | Location | Distance | Elevation | Status |
|---|---|---|---|---|---|
| City of Trees Marathon | October 2026 | Boise, United States | Marathon | 200 ft | Registration Open |
| Boise Half Marathon | November 2026 | Boise, United States | Half Marathon | 20 m | Registration Open |
| Coeur d'Alene Marathon | May 2027 | Coeur d'Alene, United States | Marathon | 220 m | Registration Open |
| Spirit of Magic Valley Half Marathon | June 2027 | Twin Falls, United States | Half Marathon | 120 m | Opening Soon |
| Boise Marathon | June 2027 | Boise, United States | Marathon | 150 m | Registration Open |
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